Superficial Basal cell carcinoma
Authored by: Ashfaq A. Marghoob
The basaloid tumor islands in superficialThis glossary term has not yet been described. basal cell carcinomais the most common skin cancer, and one of the most common cancers in the United States. While BCC has a very low metastatic risk, this tumor can cause significant disfigurement by invading surrounding tissues (sBCC) extend from the epidermis into the papillary dermis . DermoscopyDermoscopy is a non invasive diagnostic method. can predict the diagnosisThis glossary term has not yet been described. of sBCC with a sensitivity of 81.9% and specificity of 81.8% .
1. Leaf-like structures
2. Spoke wheel-like structures
4. Brown dotsThis glossary term has not yet been described. – correspond to small pigmented BCC tumor islands located at the dermal-epidermal junction. Similar size pigmented BCC tumor islands in the papillary dermis appear as blue-gray dots/globules.
5. Short fine superficial telangiectasia
6. Multiple small erosions
7. Shiny white blotches and strandsWhite structures in the form of circles, oval structures, or large structureless areas that are bright-white longer and less well defined lines oriented parallel or distributed haphazardly, or forming blotches (shiny white clods). Seen only under polarized dermoscopy.. It is not uncommon for sBCC to only reveal shiny white blotches and strandsWhite structures in the form of circles, oval structures, or large structureless areas that are bright-white longer and less well defined lines oriented parallel or distributed haphazardly, or forming blotches (shiny white clods). Seen only under polarized dermoscopy. with or without short fine superficial telangiectasia.
Features predictive against the diagnosis of sBCC include :
2. blue-gray ovoid nest/s (negative odds ratio 3.2)
3. ulceration (negative odds ratio 2.1)
Features that may be seen in sBCC but that are not predictive for or against the diagnosis of sBCC include multiple non-aggregated blue-gray globules and multiple in-focus blue-gray dots, which often present in a buckshot scatter distribution .
Heavily pigmented sBCC can sometimes mimic melanomaThis glossary term has not yet been described. . In such lesions the leaf-like or spoke wheel-like structures can resemble streakslines, radial (always at periphery) Reed nevus, melanoma, recurrent nevus (i.e., radial streamingRadial linear extensions at the lesion edge and pseudopodsBulbous and often kinked projections seen at the lesion edge, either directly associated with a network or solid tumor border.) and the blue-gray globules can take on brown to black colors making it virtually impossible to differentiate these sBCC from melanoma .
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